diff --git a/.github/workflows/macOS.yml b/.github/workflows/macOS.yml
index 429bfce..2c2896c 100644
--- a/.github/workflows/macOS.yml
+++ b/.github/workflows/macOS.yml
@@ -12,7 +12,7 @@ on:
 jobs:
   stack:
     name: ${{ matrix.os }} / ${{ matrix.snapshot }}
-    runs-on: ${{ matrix.os }}-latest
+    runs-on: ${{ matrix.os }}-12
     continue-on-error: ${{ matrix.snapshot == 'nightly' }}
     strategy:
       fail-fast: false